American singer Christina Aguilera has performed on six concert tours, one promotional tour and one concert residencies. Additionally, she has performed at seventeen music festivals, and seven benefit concerts. She began her touring career in 2000, with Christina Aguilera in Concert. Originally held in North America in 2000 to promote her debut album, Christina Aguilera (1999), it was extended into 2001 following the release of Mi Reflejo (2000), with shows in Latin America and Asia. The tour was received well by critics, who complimented Aguilera's showmanship and vocals, which received comparisons to Mariah Carey and Whitney Houston. The touring act for Stripped (2002) was performed across two tours: The Justified & Stripped Tour with Justin Timberlake and The Stripped Tour. Lasting 45 shows, The Justified & Stripped Tour kicked off in June 2003 and became 16th highest-grossing tour of 2003. In September, Aguilera continued the tour without Timberlake, taking the show to Europe, Japan, and Australia until the end of the year. Her set was compared to Cher's image in the 1980s by several critics. An additional 29 dates were scheduled for 2004 with a new theme, but were cancelled after Aguilera suffered a vocal cord injury.